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Starting from rest, a basketball rolls from the top to the bottom of a hill, reaching a translational speed of 7.9 m/s. Ignore frictional losses. (a) What is the height of the hill? (b) Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can when it reaches the bottom?
Estimate the terminal velocity for a dust particle in air. Assume it has a radius of 1.0 um and a density similar to that of balsa wood
question fm radio stations use radio waves with frequencies from 88.0 to 108 mhz to broadcast their signals. assuming
A 5.00 kg ball, moving to the right at a velocity of +2.00 m/s on afriction less table, collides head-onwith a 7.50 kg ball moving with a velocity of -1.00 m/s. Find the final velocities of the ball if the collision is a) elastic, and b) completel..
An aluminum cup contains 225 g ofwater and a 40 g copper stirrer, all at 27°C. Calculate the mass of the aluminum cup
You have designed a cat door that consists of a square piece of plywood that is 1.0 in thick and 6.0 on a side, and is hinged at its top. To make sure the cat has sufficient time to get through hit safely, the door should have a natural period of at ..
Your teacher tosses a basketball. The ball gets through the hoop (lucky shot). How long does it take the ball to reach the hoop
A certain refrigerator is rated as being 31% as efficient as a Carnot refrigerator. how much work must the refrigerator motor do
Norma the astronaut is on a 100m lifeline outside a spaceship, circling the ship with an angular speed of 0,100 rad/s. How far inward can she be pulled before the centripetal acceleration reaches 5g = 49m/s2?
Water flows through a 2.7cm -diameter pipe at 2.1m/s. If the pipe narrows to 1.7cm diameter, what is the flow speed in the constriction
A swimmer heading directly across a river 200 m wide reaches the opposite bank in 6 min 40 s. She is swept downstream 480 m. What is the speed of the current
A 2.00-nF capacitor with an initial charge of 5.06 µC is discharged through a 1.28-k? resistor. What is the maximum current in the resistor
radiation from a star reaches a planet's surface at an average rate of 2700 w/m^2, Find the force exerted on a roof that has dimensions 10x20 m
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